/* This file is part of the Sub::Op Perl module.
* See http://search.cpan.org/dist/Sub-Op/ */
#define PERL_NO_GET_CONTEXT
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#define __PACKAGE__ "Sub::Op"
#define __PACKAGE_LEN__ (sizeof(__PACKAGE__)-1)
/* --- Compatibility wrappers ---------------------------------------------- */
#define SO_HAS_PERL(R, V, S) (PERL_REVISION > (R) || (PERL_REVISION == (R) && (PERL_VERSION > (V) || (PERL_VERSION == (V) && (PERL_SUBVERSION >= (S))))))
/* ... Thread safety and multiplicity ...................................... */
#ifndef SO_MULTIPLICITY
# if defined(MULTIPLICITY) || defined(PERL_IMPLICIT_CONTEXT)
# define SO_MULTIPLICITY 1
# else
# define SO_MULTIPLICITY 0
# endif
#endif
#if SO_MULTIPLICITY && !defined(tTHX)
# define tTHX PerlInterpreter*
#endif
#if SO_MULTIPLICITY && defined(USE_ITHREADS) && defined(dMY_CXT) && defined(MY_CXT) && defined(START_MY_CXT) && defined(MY_CXT_INIT) && (defined(MY_CXT_CLONE) || defined(dMY_CXT_SV))
# define SO_THREADSAFE 1
# ifndef MY_CXT_CLONE
# define MY_CXT_CLONE \
dMY_CXT_SV; \
my_cxt_t *my_cxtp = (my_cxt_t*)SvPVX(newSV(sizeof(my_cxt_t)-1)); \
Copy(INT2PTR(my_cxt_t*, SvUV(my_cxt_sv)), my_cxtp, 1, my_cxt_t); \
sv_setuv(my_cxt_sv, PTR2UV(my_cxtp))
# endif
#else
# define SO_THREADSAFE 0
# undef dMY_CXT
# define dMY_CXT dNOOP
# undef MY_CXT
# define MY_CXT indirect_globaldata
# undef START_MY_CXT
# define START_MY_CXT STATIC my_cxt_t MY_CXT;
# undef MY_CXT_INIT
# define MY_CXT_INIT NOOP
# undef MY_CXT_CLONE
# define MY_CXT_CLONE NOOP
#endif
/* --- Global data --------------------------------------------------------- */
#define MY_CXT_KEY __PACKAGE__ "::_guts" XS_VERSION
typedef struct {
HV *map;
CV *placeholder;
#if SO_THREADSAFE
tTHX owner;
#endif /* SO_THREADSAFE */
} my_cxt_t;
START_MY_CXT
#if SO_THREADSAFE
STATIC SV *so_clone(pTHX_ SV *sv, tTHX owner) {
#define so_clone(S, O) so_clone(aTHX_ (S), (O))
CLONE_PARAMS param;
AV *stashes = NULL;
SV *dupsv;
if (SvTYPE(sv) == SVt_PVHV && HvNAME_get(sv))
stashes = newAV();
param.stashes = stashes;
param.flags = 0;
param.proto_perl = owner;
dupsv = sv_dup(sv, ¶m);
if (stashes) {
av_undef(stashes);
SvREFCNT_dec(stashes);
}
return SvREFCNT_inc(dupsv);
}
#endif /* SO_THREADSAFE */
#define PTABLE_NAME ptable
#define PTABLE_VAL_FREE(V) PerlMemShared_free(V)
#include "ptable.h"
/* PerlMemShared_free() needs the [ap]PTBLMS_? default values */
#define ptable_store(T, K, V) ptable_store(aPTBLMS_ (T), (K), (V))
STATIC ptable *so_op_name = NULL;
#ifdef USE_ITHREADS
STATIC perl_mutex so_op_name_mutex;
#endif
typedef struct {
STRLEN len;
char buf;
} so_op_name_t;
/* --- Public API ---------------------------------------------------------- */
#include "sub_op.h"
void sub_op_register(pTHX_ const sub_op_config_t *c) {
SV *key = newSViv(PTR2IV(c->pp));
if (!PL_custom_op_names)
PL_custom_op_names = newHV();
(void) hv_store_ent(PL_custom_op_names, key, newSVpv(c->name, c->namelen), 0);
if (!PL_custom_op_descs)
PL_custom_op_descs = newHV();
(void) hv_store_ent(PL_custom_op_descs, key, newSVpv(c->name, c->namelen), 0);
if (c->check) {
SV *check = newSViv(PTR2IV(c->check));
sv_magicext(key, check, PERL_MAGIC_ext, NULL, c->ud, 0);
SvREFCNT_dec(check);
}
{
dMY_CXT;
(void) hv_store(MY_CXT.map, c->name, c->namelen, key, 0);
}
}
/* --- Private helpers ----------------------------------------------------- */
STATIC IV so_hint(pTHX) {
#define so_hint() so_hint(aTHX)
SV *hint;
#if SO_HAS_PERL(5, 9, 5)
hint = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash,
NULL,
__PACKAGE__, __PACKAGE_LEN__,
0,
0);
#else
{
SV **val = hv_fetch(GvHV(PL_hintgv), __PACKAGE__, __PACKAGE_LEN__, 0);
if (!val)
return 0;
hint = *val;
}
#endif
return (SvOK(hint) && SvIOK(hint)) ? SvIVX(hint) : 0;
}
STATIC OP *(*so_old_ck_entersub)(pTHX_ OP *) = 0;
STATIC OP *so_ck_entersub(pTHX_ OP *o) {
o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
if (so_hint()) {
OP *ex_list, *rv2cv, *gvop, *last_arg = NULL;
GV *gv;
if (o->op_type != OP_ENTERSUB)
goto skip;
if (o->op_private & OPpENTERSUB_AMPER) /* hopefully \&foo */
goto skip;
ex_list = cUNOPo->op_first;
/* pushmark when a method call */
if (!ex_list || ex_list->op_type != OP_NULL)
goto skip;
rv2cv = cUNOPx(ex_list)->op_first;
if (!rv2cv)
goto skip;
while (1) {
OP *next = rv2cv->op_sibling;
if (!next)
break;
last_arg = rv2cv;
rv2cv = next;
}
if (!(rv2cv->op_flags & OPf_KIDS))
goto skip;
gvop = cUNOPx(rv2cv)->op_first;
if (!gvop || gvop->op_type != OP_GV)
goto skip;
gv = cGVOPx_gv(gvop);
{
SV *pp_sv, **svp;
CV *cv = NULL;
const char *name = GvNAME(gv);
I32 len = GvNAMELEN(gv);
dMY_CXT;
svp = hv_fetch(MY_CXT.map, name, len, 0);
if (!svp)
goto skip;
pp_sv = *svp;
if (!pp_sv || !SvOK(pp_sv))
goto skip;
if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
SvREFCNT_dec(cv);
GvCV(gv) = NULL;
}
o->op_type = OP_CUSTOM;
o->op_ppaddr = INT2PTR(Perl_ppaddr_t, SvIVX(pp_sv));
if (last_arg)
last_arg->op_sibling = NULL;
op_free(rv2cv);
{
MAGIC *mg = mg_find(pp_sv, PERL_MAGIC_ext);
if (mg) {
sub_op_check_t check = INT2PTR(sub_op_check_t, SvIVX(mg->mg_obj));
o = CALL_FPTR(check)(aTHX_ o, mg->mg_ptr);
}
}
{
so_op_name_t *on = PerlMemShared_malloc(sizeof(*on) + len);
Copy(name, &on->buf, len, char);
(&on->buf)[len] = '\0';
on->len = len;
#ifdef USE_ITHREADS
MUTEX_LOCK(&so_op_name_mutex);
#endif /* USE_ITHREADS */
ptable_store(so_op_name, o, on);
#ifdef USE_ITHREADS
MUTEX_UNLOCK(&so_op_name_mutex);
#endif /* USE_ITHREADS */
}
}
}
skip:
return o;
}
STATIC OP *(*so_old_ck_gelem)(pTHX_ OP *) = 0;
STATIC OP *so_ck_gelem(pTHX_ OP *o) {
o = CALL_FPTR(so_old_ck_entersub)(aTHX_ o);
if (so_hint()) {
OP *rv2gv, *gvop;
GV *gv;
rv2gv = cUNOPo->op_first;
if (!rv2gv)
goto skip;
gvop = cUNOPx(rv2gv)->op_first;
if (!gvop || gvop->op_type != OP_GV)
goto skip;
gv = cGVOPx_gv(gvop);
if (!gv)
goto skip;
{
CV *cv;
dMY_CXT;
if (gv && SvTYPE(gv) >= SVt_PVGV && (cv = GvCV(gv)) == MY_CXT.placeholder) {
SvREFCNT_dec(cv);
GvCV(gv) = NULL;
}
}
}
skip:
return o;
}
/* --- XS ------------------------------------------------------------------ */
MODULE = Sub::Op PACKAGE = Sub::Op
PROTOTYPES: ENABLE
BOOT:
{
so_op_name = ptable_new();
#ifdef USE_ITHREADS
MUTEX_INIT(&so_op_name_mutex);
#endif
MY_CXT_INIT;
MY_CXT.map = newHV();
MY_CXT.placeholder = NULL;
#if SO_THREADSAFE
MY_CXT.owner = aTHX;
#endif /* SO_THREADSAFE */
so_old_ck_entersub = PL_check[OP_ENTERSUB];
PL_check[OP_ENTERSUB] = so_ck_entersub;
so_old_ck_gelem = PL_check[OP_GELEM];
PL_check[OP_GELEM] = so_ck_gelem;
}
#if SO_THREADSAFE
void
CLONE(...)
PROTOTYPE: DISABLE
PREINIT:
HV *map;
CV *placeholder;
tTHX owner;
PPCODE:
{
dMY_CXT;
owner = MY_CXT.owner;
map = (HV *) so_clone((SV *) MY_CXT.map, owner);
placeholder = (CV *) so_clone((SV *) MY_CXT.placeholder, owner);
}
{
MY_CXT_CLONE;
MY_CXT.map = map;
MY_CXT.placeholder = placeholder;
MY_CXT.owner = aTHX;
}
XSRETURN(0);
#endif /* SO_THREADSAFE */
void
_placeholder(SV *sv)
PROTOTYPE: $
PPCODE:
if (SvROK(sv)) {
sv = SvRV(sv);
if (SvTYPE(sv) >= SVt_PVCV) {
dMY_CXT;
SvREFCNT_dec(MY_CXT.placeholder);
MY_CXT.placeholder = (CV *) SvREFCNT_inc(sv);
}
}
XSRETURN(0);
void
_custom_name(SV *op)
PROTOTYPE: $
PREINIT:
OP *o;
so_op_name_t *on;
PPCODE:
if (!SvROK(op))
XSRETURN_UNDEF;
o = INT2PTR(OP *, SvIV(SvRV(op)));
if (!o || o->op_type != OP_CUSTOM)
XSRETURN_UNDEF;
#ifdef USE_ITHREADS
MUTEX_LOCK(&so_op_name_mutex);
#endif /* USE_ITHREADS */
on = ptable_fetch(so_op_name, o);
#ifdef USE_ITHREADS
MUTEX_UNLOCK(&so_op_name_mutex);
#endif /* USE_ITHREADS */
if (!on)
XSRETURN_UNDEF;
ST(0) = sv_2mortal(newSVpvn(&on->buf, on->len));
XSRETURN(1);
void
_constant_sub(SV *sv)
PROTOTYPE: $
PPCODE:
if (!SvROK(sv))
XSRETURN_UNDEF;
sv = SvRV(sv);
if (SvTYPE(sv) < SVt_PVCV)
XSRETURN_UNDEF;
ST(0) = sv_2mortal(newSVuv(CvCONST(sv)));
XSRETURN(1);